### Typed handlers

Typed handlers are handlers that have a specific type for the request and response payloads.
These must provide `msgp` serialization and deserialization.

In the examples we use a `MSS` type, which is a `map[string]string` that is `msgp` serializable.

```go
    handler := func(request *grid.MSS) (*grid.MSS, *grid.RemoteErr) {
        fmt.Println("Got request with field", request["myfield"])
        // Do something with payload

	bucket       string     `msg:"b"`
	filter       string     `msg:"flt"`
	id           string     `msg:"id"`
	error        string     `msg:"err"`
	root         string     `msg:"root"`
	fileNotFound bool       `msg:"fnf"`
	status       scanStatus `msg:"stat"`
	recursive    bool       `msg:"rec"`
	dataVersion  uint8      `msg:"v"`
}

func (m *metacache) finished() bool {
	return !m.ended.IsZero()
}

	"io"
	"net/http"
	"os/user"
	"path"
	"runtime/debug"
	"strconv"
	"strings"
	"sync"
	"time"

	"github.com/minio/minio/internal/bpool"
	"github.com/minio/minio/internal/grid"
	"github.com/tinylib/msgp/msgp"

	jwtreq "github.com/golang-jwt/jwt/v4/request"
	"github.com/minio/madmin-go/v3"
	"github.com/minio/minio/internal/config"
	xhttp "github.com/minio/minio/internal/http"
	xioutil "github.com/minio/minio/internal/ioutil"

package cmd

import (
	"github.com/tinylib/msgp/msgp"
)

// DecodeMsg implements msgp.Decodable
func (z *ChecksumAlgo) DecodeMsg(dc *msgp.Reader) (err error) {
	{
		var zb0001 uint8
		zb0001, err = dc.ReadUint8()
		if err != nil {
			err = msgp.WrapError(err)
			return
		}
		(*z) = ChecksumAlgo(zb0001)
	}
	return
}

// EncodeMsg implements msgp.Encodable

	"github.com/minio/madmin-go/v3"
)

//go:generate msgp -file=$GOFILE

// SiteResyncStatus captures current replication resync status for a target site
type SiteResyncStatus struct {
	Version int `json:"version" msg:"v"`
	// Overall site status
	Status                        ResyncStatusType            `json:"st" msg:"ss"`
	DeplID                        string                      `json:"dId" msg:"did"`

	// 1: Echo
	h1 := NewSingleHandler[*MSS, *MSS](handlerTest, NewMSS, NewMSS)
	// Handles incoming requests, returns a response
	handler1 := func(req *MSS) (resp *MSS, err *RemoteErr) {
		resp = h1.NewResponse()
		maps.Copy((*resp), *req)
		return resp, nil
	}
	// Return error
	h2 := NewSingleHandler[*MSS, *MSS](handlerTest2, NewMSS, NewMSS)
	handler2 := func(req *MSS) (resp *MSS, err *RemoteErr) {
		defer req.Recycle()

	for _, totalSize := range totalSizes {
		// Check if totalSize has minimum range upto setSize
		if totalSize < setSizes[0] || totalSize < setDriveCount {
			msg := fmt.Sprintf("Incorrect number of endpoints provided %s", args)
			return nil, config.ErrInvalidNumberOfErasureEndpoints(nil).Msg(msg)
		}
	}

	commonSize := getDivisibleSize(totalSizes)
	possibleSetCounts := func(setSize uint64) (ss []uint64) {
		for _, s := range setSizes {

	DiskID   string   `msg:"id"`
	Volume   string   `msg:"v"`
	FilePath string   `msg:"fp"`
	FI       FileInfo `msg:"fi"`
}

// DeleteFileHandlerParams are parameters for DeleteFileHandler
type DeleteFileHandlerParams struct {
	DiskID   string        `msg:"id"`
	Volume   string        `msg:"v"`
	FilePath string        `msg:"fp"`
	Opts     DeleteOptions `msg:"do"`
}

	// Total number of failed operations
	FailedCount int64 `json:"failedReplicationCount"  msg:"frc"`
	// Completed size in bytes
	ReplicatedSize int64 `json:"completedReplicationSize"  msg:"rs"`
	// Total number of failed operations
	ReplicatedCount int64 `json:"replicationCount"  msg:"rrc"`
	// Last bucket/object replicated.
	Bucket string `json:"-" msg:"bkt"`
	Object string `json:"-" msg:"obj"`

package cmd

import (
	"time"

	miniogo "github.com/minio/minio-go/v7"
	"github.com/minio/minio/internal/auth"
	"github.com/minio/pkg/v3/xtime"
)

//go:generate msgp -file $GOFILE

// replicate:
//   # source of the objects to be replicated
//   source:
//     type: "minio"
//     bucket: "testbucket"
//     prefix: "spark/"
//
//   # optional flags based filtering criteria